To those who are looking for a rare one to complete their collection, like I was, my best tip for you is to just to encage every pet you see, they are much more common to find as secondary pet than a invidual spawn.

It took me about 40 mins to find P/S rare, after I accidentally killed the first one OTL

Not many spawn, and they are scattered all around. After two days of hunting, I finally found one as a secondary pet to a Dusk Spiderling, of which there are many. They show up when battling most other pets in the zone (Mice, spiderlings, roaches, etc.), so just engage everything you see.

IMHO- Clearly one of the most difficult battle pets to find in rare form in Duskwood! Not an abundance available to search among and have yet to find a rare after hours of searching on two different realms. {update}-Finally found a rare after two days, two realms, and many hours. He was the secondary pet to a mouse.

Re:- your comments below Contre about the rogue, PVP servers stink as I was mid battle with a rare very difficult to get qiraji hatchling and a horde killed me and thus my pet was gone. none fair in pvp :(

update: not even kidding, finally found another rare and I got knocked out of the fight by a rogue. Pet despawned. FML

I need a rare rat snake and I need a rare skunk. I fly into Duskwood and I see a skunk. First fight of the night. And the add? A rare rat snake. So I'm like, "awesome!" and I forfeit the match to grab my turnip. While I'm doing that, a worg comes in and kills the skunk in front of me. So instead of farming rare pets tonight, I'm killing every damn worg in the zone.

update: not even kidding, finally found another rare and I got knocked out of the fight by a rogue. Pet despawned. FML

So I have been farming Duskwood for about an hour and have seen a far Share of Rat Snake's but no luck in a rare. I did however manage to snag a Green for the time being as I am working towards a total rare collection. Its 9:30 Server atm so Ill keep farming for bit longer and keep you posted on my progress.

Update:

After killing about another 20 pets I found a Rare Rat Snake at 10:07 Server time at coordinates 48.3 X 61.9

Looking for a rare and finding its hard to find any at all, nevermind a rare. I have only seen 2 as the primary pet in over an hour of looking. Found a couple as the secondary and all were common or poor. Will have to keep looking.

Update: Found a bunch as primary and secondary at Rotting Orchard, but still no rares there.

Found out something this evening I was farming the widow spiderling and then they disappeared and suddenly duskwood was full of the Rat Snakes, so i am taking it that they spawn after the widow spiderling go.